How should I start asking for pay?

I’m currently a junior right now with an internship with my local academy that teaches coding. I started this internship last year in sophomore year and I have been doing it to this day. When I enter senior year, however, I want to start getting paid. How should I ask my boss to start paying me? I only want to receive minimum wage (for now).

I’d just tell them that you need to start earning money and ask if they have any paid positions.